Tire tightener



C. A. HAMMARLUND ET Al.

TIRE TIGHTENER Filed Dec. 27. 1923 I l5 J7 .57i/er? for@ GSH Hmma//ynj jefe/@nvm Patented Nov. 25, 1.924.

'UNHTE STE CARL ALBERT HAMlEEkl-LUNP, Gli1 E-KET, AND XVLERLU/. SEGEBST'ROM, OE ANGEL- HOLY/l, SWEDEN.

TIRE TIGHTENER.

Application filed December 27, 1823.

To @ZZ whom it may concern:

Be it known that we, CARL ALBERT HAM MARLUND, a citizen ot Sweden, residing at Eket, Sweden, and WILHELM SEGERSTROM, a citizen ot Sweden, residing at Angelholm, Sweden, have invented certain new and usetulTire Tighteners, ot which the following is a specification, reterence being had to the accompanying drawing.

The present invention reters to wheels having tellies ot wood or the like provided with open iron bands, the ends ot which overlap each other and the inner end ot which is secured to the telly by means ot bolts, screws or the like, and the invention particularly relates to means ot securing and adjusting the outer end ot said'iron band so that the latter always tits tightly on the telly.

VIron bands tor wood tellies and provided with overlapping ends are already known the ends .being usually welded together or securely tixed to each other by other suitable means.

Adjusting devices ot asimilar kind are also known tor securing an elastic tyre to a wheel rim.

The present invention consists in the provision ot an iron band with overlapping ends the outer one ot which being provided with a stay, tor example a bolt, adapted to pass through a longitudinal slot in the inner end ot the iron band and also through a corresponding slot in the telly, a sleeve socket being arranged at the inside ot the telly adapted to support the tightening member tor the bolt, tor example a nut, a wedge or the like, and a resilient means arranged between the end ot the sleeve socket and the tightening member.

The invention turther consists in the arrangement ot the said bolt at an inclined position in relation to the iron band and in the bolt provided with a longitudinally eirtending head loosely fitting in a corresponding recess at the outside ot the outer end ot the band.

The invention is based on the knowledge gained by experiments and experience that the shrinking ot the wheel by atmospheric influences and also the stretching ot the iron band which comes about atter a time and which necessitates an adjustment ot the band take place comparatively slowly, so that'it is not under all circumstances practically necessary that the adjustment must Serial 683,020.

be automatic but it may in case ot need also be carried out manually with the same result.

ln the accompanying drawing Figure l is a side view ot a wheel provided with the improved adjusting means. Figure 2 shows on a larger scale, a telly section provided with the improved means in a lside view partly in section, and Figure 3 is a top view ot Figure 2. l

Referring to the drawing 1 denotes the iron band, the inner end 2 ot which is provided with a projection 3 extending at right angles and iitting int notch 4 provided at the circumference ot the telly 5. The outer end 6 ot the iron band is tapered4 so as to correspond with a corresponding tapering partly arranged on the telly and partly on the'inner end ot the band so as to secure a unitorin thickness throughout the whole rim. @his outer end (l is turther provided with a somewhat tapered longitudinal recess .7 into which loosely tits the correspondingly sh apedV head 8 ot the tightening bolt 9. This bolt passes through slots 10 and 11 arranged in the inner end 2 ot tie band and in the telly 5 respectively and also through the sleeve socket 12, the latter being provided with rounded oit abutting surface 16 sub stantially at right angles to the axis ot the hole in the sleeve socket and engaged by the tightening means tor the bolt. It is to be observed that the said slots and the sleeve socket as well as the head ot the bolt are arranged in such a manner that the bolt is positioned as nearly tangential to the iron band possible, so that the tightening ettect ot the bolt may easily be obtained. The sleeve socket 12 is integral with a plate 13 which is tixed to the telly by screws or in any other suitable manner, tor example, as shown in the drawing, by rivets 14. which connect the plate and the inner end ot the band to the telly. ln the drawing the tightening means consists ot a nut 15, tor which however equivalent means may be substituted. Between the nut 15 and' the abutting surface 16 ot the sleeve socket 12 a helical spring 17 is arranged, said spring serving the purpose to automatically allow the outer end ot the band to move and thus the band as a whole to expand or to be tightened in all after circumstances. lt tor instance the wheel and thus its telly should shrink on account ot dry warm weather the iron band will be tightened by the spring and if on Wet days the felly swells the band can expand accordingly. To meet greater variations in the circumference of the felly caused for eX- ample by great heat in the summer time and extreme moisture in the Winter time the iron band may of course be adjusted manually by screwing the nut on the bolt or unscrewing the same.

On account of the iron band not requiring any Welding together of its ends the band may be made of hardened steel Whereby the life of the saine is considerably prolongated and further the band may be fitted to the Wheel by anyone not skilled in the art.

Further advantages connected with the improved means consist in that the Wheel may be impregnated or painted before the band is put on as such impregnating will not be damaged because the band need not be put on in a heated condition, and the Wood of the Wheel together with the joints of the telly will be preserved as the band always.

keeps the same in a tightened condition.

What We claim and desire to secure by Letters Patent is l. In a Wheel, the combination with the wooden felly thereof, of a socket secured to the inside of the felly, a tire on the Wheel and formed With overlappingends for providing a smooth outer surface on the tire, the inner one of the ends being secured to the felly, the outer one of the ends having a slidable fit on the inner end, a recess in the outer end of the tire, a draw-bolt provided at one end with a head fitted in the recess in the outer end of the tire, corresponding slots in the inner end of the tire and felly, the draifv-bolt extending through the slots in the inner end of the tire and the felly and through the socket, and resilient tightening means on a projecting end of the draw-bolt.

2. In a wheel, the combination with the wooden felly thereof, of a socket, a plate integral with the socket and secured to the inside of thc felly, a tire on the Wheel and formed with overlapping ends, the inner one of the ends being secured to the felly and the outer one of the ends having a slidable fit on the inner end, the outer end being tapered, a corresponding taper formed partly on the felly and partly on the tire inner end, the taners interacting to form a smooth outer surface on the tire, a recessin the outer end of the tire, a draw-bolt provided at one end With a head titted in the recess in the outer end, corresponding slots in the inner end of the Vtire and the feily, the draw-bolt extending through the slots and the socket, a tightening nut on a projecting end of the draw-bolt, and a coiled spring interposed between the tightening nut and the socket.V

ln testimony whereof, We have signed our naines to this specification in the presence of two subscribing Witnesses.

CARL ALBERT HAMMARLUND. l/VILHELM SEGERSTRUM. Vilitnesses ERioEnicssoN, G. PETERSON. 

